Shock wave catheter system

Abstract

The utility model relates to a shock wave catheter system, which comprises a catheter main body and an electrode assembly arranged at one end part of the catheter main body, and is characterized in that the catheter main body is provided with an electrode cavity; the electrode assembly comprises a first electrode and one or more second electrodes, the first electrode is arranged on the periphery of one end of the catheter body in a sleeving mode, the second electrodes are arranged in the electrode cavities, each second electrode corresponds to one electrode cavity, one of the first electrode and the second electrode is used for being connected with the positive electrode of a power source, and the other one is used for being connected with the negative electrode of the power source. When voltage or current is applied to the first electrode and the second electrode, shock waves in the advancing direction are generated between the first electrode and the second electrode. The first electrode and one or more second electrodes can discharge independently, simultaneously or sequentially, a discharge area can be separated, impact on a non-blocking area is reduced, blood vessels cannot be damaged, safety is high, and operation is flexible and controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a shock wave catheter system. Background Art

[0002] Occlusive vascular disease can be treated by passing a guide wire or a mechanical drill-like method through the diseased area to create a channel for interventional treatment, namely angioplasty. Guide wires or methods similar to mechanical drilling are used to directly puncture hard deposits to create a pathway for delivering balloon catheters or stents to the lesion. This requires extremely experienced physicians to use. If the guide wire or drill deviates during treatment, it is very likely to perforate the blood vessel, posing a significant risk. In addition, existing treatment systems, such as balloon catheters, are not suitable for the treatment of intractable fibrotic and calcified occlusive tissue during percutaneous coronary angioplasty or peripheral angioplasty.

[0003] Some devices currently available for treating chronic total occlusions (CTOs) use ultrasound, piezoelectric crystals, or linear acoustic shockwave sources to deliver mechanical energy to disrupt chronic occlusions. Typically, these devices direct strong mechanical vibrations along a guidewire to drill through fibrotic and calcified tissue in the blood vessel; however, these systems require bulky and expensive generators to operate, and the intensity of the vibrations can make the guidewire difficult to control, risking damage to the vessel wall during treatment. Summary of the Invention

[0004] The purpose of the utility model is to provide a shock wave catheter system suitable for treating completely occluded cardiovascular diseases.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A shock wave catheter system comprises a catheter body and an electrode assembly, wherein the electrode assembly is arranged at one end of the catheter body, and the catheter body is provided with an electrode cavity; the electrode assembly comprises a first electrode and a second electrode, wherein the first electrode is sleeved on the outer circumference of one end of the catheter body, and one or more second electrodes are provided and arranged in the electrode cavity, each second electrode corresponding to one electrode cavity, and one of the first electrode and the second electrode is used to connect to the positive pole of a power supply, and the other is used to connect to the negative pole of the power supply, and when a voltage or current is applied to the first electrode and the second electrode, a shock wave in a forward direction is generated between the first electrode and the second electrode.

[0007] In the above technical solution, preferably, when a plurality of second electrodes are provided, shock waves are generated between the first electrode and the plurality of second electrodes in sequence, or simultaneously, so that the manner of generating shock waves is more flexible.

[0008] In the above technical solution, preferably, when a plurality of second electrodes are provided, the plurality of second electrodes are evenly distributed on the cross section of one end portion of the catheter body, and when shock waves are generated, the energy is more balanced.

[0009] In the above technical solution, preferably, there are two, three, four or more second electrodes.

[0010] In the above technical solution, preferably, the first electrode is a ring-shaped electrode, which may be a circular ring, a semicircular ring, etc.; and the second electrode is a columnar electrode or a block electrode.

[0011] Preferably, the above technical solution is such that the system further comprises a balloon, which is connected to one end of the catheter body. The catheter body is provided with a medium cavity, which is communicated with the balloon and is used to fill the balloon with a medium to expand it. When the balloon is expanded, it can be used to support the catheter body so that it remains centered in the blood vessel.

[0012] Preferably, in the above technical solution, the catheter body is further provided with a guidewire cavity and a conductive fluid cavity, and the number of the conductive fluid cavity is at least one, such as two, three, four or more.

[0013] Preferably, in the above technical solution, the system further comprises a developing component, and the developing component is arranged at one end of the catheter body.

[0014] Preferably, in the above technical solution, the system further comprises a handle, which is connected to the other end of the catheter body and is used to operate the catheter body.

[0015] Preferably, the above technical solution comprises: an energy generator connected to the electrode assembly for providing a shock wave source for the electrode assembly; and the frequency generated by the shock wave source is 10 Hz to 100 Hz.

[0016] The working principle of this application is:

[0017] A high-voltage pulse is applied between the first electrode and the second electrode to form a plasma arc between the first electrode and the second electrode. The plasma arc heats the conductive fluid (perfused saline or blood), thereby generating rapidly expanding cavitation bubbles. The expansion and rupture of the cavitation bubbles generate shock waves in the forward direction to open up occluded fibrotic and calcified tissues.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] The utility model uses the electric arc generated between the end electrodes in conjunction with the conductive fluid to form a shock wave in the forward direction to open the occluded fibrotic and calcified tissue without damaging the blood vessels. In addition, a first electrode can discharge with one or more second electrodes separately, simultaneously or sequentially, and the discharge area can be separated to reduce the impact of the non-occluded area. It is highly safe and has flexible and controllable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attachment Figure 1 It is a structural diagram of the utility model;

[0021] Attachment Figure 2 This is a schematic diagram of the structure of the utility model when it includes a balloon;

[0022] Attachment Figure 3 This is a schematic cross-sectional view of the main body of the catheter of the present invention;

[0023] Attachment Figure 4 It is a side cross-sectional schematic diagram of the catheter body of the present utility model;

[0024] Attachment Figure 5 This is a schematic diagram of the use state of the utility model.

[0025] In the above attached figures:

[0026] 1. Catheter body; 10. Electrode cavity; 11. Guidewire cavity; 12. Conductive fluid cavity;

[0027] 20. First electrode; 21. Second electrode;

[0028] 3. Handle;

[0029] 4. Balloon;

[0030] 5. Development ring;

[0031] 60. Vascular wall; 61. Occlusive tissue;

[0032] 7. Guide wire. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] like Figure 1 The shock wave catheter system shown in the figure includes a catheter body 1, an electrode assembly, a handle 3 and an energy generator (not shown in the figure). Each component is described in detail below.

[0036] The catheter body 1 is provided with an electrode cavity 10, a guide wire cavity 11, and a conductive fluid cavity 12. The electrode cavity 10, the guide wire cavity 11, and the conductive fluid cavity 12 all pass through both ends of the catheter body 1. Figure 3 、 4 As shown. Among them: the electrode cavity 10 is used to set the electrode; the guidewire cavity 11 is used to pass the guidewire; the conductive fluid cavity 12 is used to perfuse the conductive fluid, such as physiological saline, etc. The perfusion of the conductive fluid is mainly used to prevent the accumulation of bubbles generated by breakdown discharge, the excessively high local temperature of breakdown, and the discharge of the electrode assembly causing blood coagulation and thrombosis. The conductive fluid cavity 12 is provided with at least one, such as two, three, four or more, to ensure that the conductive fluid meets the treatment requirements. In this embodiment: the catheter body 1 can adopt a multi-lumen tube. In the figure, the guidewire cavity 11 is located in the middle of the catheter body 1, and the electrode cavity 10 and the conductive fluid cavity 12 are located around the guidewire cavity 11, and preferably evenly distributed around the guidewire cavity 11.

[0037] The electrode assembly is arranged at one end (distal end, treatment end) of the catheter body 1, and the electrode assembly includes a first electrode 20 and a second electrode 21. Figure 3 、 4 As shown. Among them:

[0038] The first electrode 20 is sleeved on the outer circumference of one end of the catheter body 1. The first electrode 20 can be a ring-shaped electrode, which can be a circular ring, a semicircular ring, etc. Only one first electrode 20 is provided.

[0039] The second electrode 21 is disposed within the electrode cavity 10, with each second electrode 21 corresponding to one electrode cavity 10, i.e., one second electrode 21 is disposed within one electrode cavity 10. The second electrode 21 can be preferably a columnar electrode or a block electrode. At least one second electrode 21 is provided, i.e., one or more, such as two, three, four, or more, are provided. When multiple second electrodes 21 are provided, the multiple second electrodes 21 are evenly distributed across the cross-section of one end of the catheter body 1. For example, when two second electrodes 21 are provided, the two second electrodes 21 are spaced 180° apart; when three second electrodes 21 are provided, the three second electrodes 21 are spaced 120° apart; when four second electrodes 21 are provided, the four second electrodes 21 are spaced 90° apart, and so on. The figure illustrates two second electrodes 21 as an example.

[0040] One of the first electrode 20 and the second electrode 21 is connected to the positive terminal of a power supply, while the other is connected to the negative terminal. When voltage or current is applied to the first and second electrodes, a forward shock wave is generated between the first and second electrodes 20, 21, opening up occluded fibrotic and calcified tissue. When multiple second electrodes 21 are provided, shock waves can be generated between the first electrode 20 and the multiple second electrodes 21 sequentially or simultaneously, providing greater flexibility in shock wave generation. Furthermore, the even distribution of multiple second electrodes 21 ensures more balanced energy when shock waves are generated simultaneously.

[0041] The handle 3 is connected to the other end of the catheter body 1 and is used to operate the catheter body 1 , such as injecting the conductive fluid into the conductive fluid cavity 12 through the handle 3 .

[0042] The energy generator is connected to the electrode assembly and is used to provide a shock wave source for the electrode assembly, and the frequency generated by the shock wave source is 10Hz to 100Hz.

[0043] The handle 3 and the energy generator do not involve the invention of this application and will not be described in detail here.

[0044] In one embodiment of the present invention, the system further includes a balloon 4, which is connected to one end of the catheter body 1. Correspondingly, the catheter body 1 is provided with a medium cavity (not shown in the figure), which is communicated with the balloon 4 and is used to fill the balloon with a medium to expand it. When the balloon 4 is expanded, it can be used to support the catheter body 1 so that it remains centered in the blood vessel. Figure 2 shown.

[0045] In one embodiment of the present invention, the system further includes a developing component 5, which is disposed at one end of the catheter body 1. In the figure, the first electrode 20, the developing ring 5, and the balloon 4 are sequentially disposed from one end to the other end of the catheter body 1. Figure 2 shown.

[0046] The following describes in detail how to use this embodiment:

[0047] The guidewire 7 is passed into the occluded position of the blood vessel, and the catheter body 1 is sent into the occluded position through the guidewire cavity 11 in conjunction with the guidewire 7. The balloon 4 is filled through the medium cavity so that the balloon 4 is expanded and supported inside the blood vessel. A conductive fluid is passed into the blood vessel through the conductive fluid cavity 12. At the same time, a pulse source with a frequency of 50 Hz is applied to the first electrode 20 and the second electrode 21. A plasma arc is formed between the first electrode 20 and the second electrode 21. The plasma arc heats the conductive fluid, thereby generating rapidly expanding cavitation bubbles. The expansion and rupture of the cavitation bubbles generate shock waves in the forward direction, which open up the occluded fibrotic and calcified tissues and complete the treatment. Figure 5 shown.

[0048] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A shock wave catheter system comprising a catheter body and an electrode assembly, wherein the electrode assembly is disposed at one end of the catheter body, and wherein: The catheter body is provided with an electrode cavity; the electrode assembly includes a first electrode and a second electrode, the first electrode is sleeved on the outer circumference of one end of the catheter body, one or more second electrodes are provided and are arranged in the electrode cavity, each second electrode corresponds to one electrode cavity, one of the first electrode and the second electrode is used to connect to the positive pole of the power supply, and the other is used to connect to the negative pole of the power supply, when voltage or current is applied to the first electrode and the second electrode, a shock wave in the forward direction is generated between the first electrode and the second electrode.

2. The shock wave guide system according to claim 1, wherein: When a plurality of the second electrodes are provided, shock waves are generated between the first electrode and the plurality of second electrodes in sequence, or simultaneously.

3. The shock wave guide system according to claim 1, wherein: When a plurality of the second electrodes are provided, the plurality of second electrodes are evenly distributed on the cross section of one end portion of the catheter body.

4. The shock wave guide system according to claim 1, wherein: There are two, three, four or more second electrodes.

5. The shock wave guide system according to claim 1, wherein: The first electrode is a ring electrode; the second electrode is a columnar electrode or a block electrode.

6. The shock wave guide system according to claim 1, wherein: The system also includes a balloon, which is connected to one end of the catheter body. The catheter body is provided with a medium cavity, which is connected to the balloon and is used to fill the balloon with medium to expand it. When the balloon is expanded, it can be used to support the catheter body so that it remains centered in the blood vessel.

7. The shock wave guide system according to claim 1, wherein: The catheter body is further provided with a guidewire cavity and a conductive fluid cavity, and at least one conductive fluid cavity is provided.

8. The shock wave guide system according to claim 1, wherein: The system further includes a developing component, which is arranged at one end of the catheter body.

9. The shock wave guide system according to claim 1, wherein: The system further comprises a handle connected to the other end of the catheter body and used for operating the catheter body.

10. The shock wave guide system according to claim 1, wherein: The system further comprises an energy generator, which is connected to the electrode assembly and is used to provide a shock wave source for the electrode assembly, and the frequency generated by the shock wave source is 10 Hz to 100 Hz.

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